Veritas Storage Foundation Intelligent Storage Provisioning 5.0 AdministratorÆs Guide, HP-UX 11i v3, First Edition, May 2008

156 Using capabilities, templates and rules
Compound rules
stripe
The stripe rule describes one or more columns of a volume. All basic rules and
some restricted form-related or mirror-related rules can be specified within a
stripe rule. ISP merges multiple
stripe rules to form a single stripe rule
whose rules are the union of the separate
stripe rules.
The following examples demonstrate the application of the stripe rule:
■ Stripe a VxVM object over 5 columns:
stripe 5
■ Use confineto rules to force a column to be created on enclosures that are
separate, but which are attached to the same controller, ctlr1:
stripe 6-2 {
confineto "Controller"="ctlr1"
separateby "Enclosure"
}
Six columns are created by preference. If this is not possible, ISP attempts
to create fewer columns down to a minimum of two.
log
The log rule describes a volume’s logs. The argument of the rule specifies how
many mirrors the log should have. Compound rules can include storage
selection rules, stripe rules, and define the log type. The following log types may
be defined:
dco Version 20 data change object (DCO) that can be used for both DRL and
FastResync.
raid5 RAID-5 log.
The following examples demonstrate the application of the log rule:
■ Create a striped RAID-5 log with 4 columns, and a DCO log, each of which
are confined to LUNs from a single (but possibly separate) enclosure:
parity true
log 1{
type raid5
confineto "Enclosure"
stripe 4
}
log 1{
type dco
confineto "Enclosure"
}